This is the 4260th most frequent Japanese word.
信夫
"信夫" is a Japanese given name, typically male, meaning "faithful man" or "trust and masculinity."
In this sentence, '信夫' is used as a proper noun, referring to a person's name: 'Shinobu'.
信夫さんは昨日、新しい仕事を始めました。
Mr. Shinobu started a new job yesterday.
Here, '信夫' is discussed as a word composed of '信' (believe) and '夫' (husband), explaining its potential semantic meaning.
信夫の意味は「信じる夫」ということです。
The meaning of 'Shinobu' is 'a husband who believes'.
The word '信夫' is referred to as a possible name which is being negated in context, focusing on identity.